如何在libcurl中阻止对特定IP的HTTP请求？

Question

我正在使用libcurl（http://curl.haxx.se/libcurl/）来触发HTTP请求。 我想在FQDN解析为IP地址后阻止对特定IP地址的请求。

我如何以及在哪里阻止特定IP地址的请求？

Answer 1

使用getaddrinfo()查找FQDN的IP地址。使用该地址来确定是否提交卷曲请求。

Answer 2

libcurl itself has no block-this-IP-functionality built-in. But it does provide you with the building blocks for you to build your own!

Use CURLOPT_OPENSOCKETFUNCTION and have your callback do the address check, and return failure if the "bad" address is used and otherwise you call the normal socket() function.